net/netfilter/nf_conntrack_standalone.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/types.h>
   3 #include <linux/netfilter.h>
   4 #include <linux/slab.h>
   5 #include <linux/module.h>
   6 #include <linux/skbuff.h>
   7 #include <linux/proc_fs.h>
   8 #include <linux/seq_file.h>
   9 #include <linux/percpu.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/security.h>
  12 #include <net/net_namespace.h>
  13 #ifdef CONFIG_SYSCTL
  14 #include <linux/sysctl.h>
  15 #endif
  16
  17 #include <net/netfilter/nf_conntrack.h>
  18 #include <net/netfilter/nf_conntrack_core.h>
  19 #include <net/netfilter/nf_conntrack_l4proto.h>
  20 #include <net/netfilter/nf_conntrack_expect.h>
  21 #include <net/netfilter/nf_conntrack_helper.h>
  22 #include <net/netfilter/nf_conntrack_acct.h>
  23 #include <net/netfilter/nf_conntrack_zones.h>
  24 #include <net/netfilter/nf_conntrack_timestamp.h>
  25 #include <linux/rculist_nulls.h>
  26
  27 static bool enable_hooks __read_mostly;
  28 MODULE_PARM_DESC(enable_hooks, "Always enable conntrack hooks");
  29 module_param(enable_hooks, bool, 0000);
  30
  31 unsigned int nf_conntrack_net_id __read_mostly;
  32
  33 #ifdef CONFIG_NF_CONNTRACK_PROCFS
  34 void
  35 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
  36             const struct nf_conntrack_l4proto *l4proto)
  37 {
  38         switch (tuple->src.l3num) {
  39         case NFPROTO_IPV4:
  40                 seq_printf(s, "src=%pI4 dst=%pI4 ",
  41                            &tuple->src.u3.ip, &tuple->dst.u3.ip);
  42                 break;
  43         case NFPROTO_IPV6:
  44                 seq_printf(s, "src=%pI6 dst=%pI6 ",
  45                            tuple->src.u3.ip6, tuple->dst.u3.ip6);
  46                 break;
  47         default:
  48                 break;
  49         }
  50
  51         switch (l4proto->l4proto) {
  52         case IPPROTO_ICMP:
  53                 seq_printf(s, "type=%u code=%u id=%u ",
  54                            tuple->dst.u.icmp.type,
  55                            tuple->dst.u.icmp.code,
  56                            ntohs(tuple->src.u.icmp.id));
  57                 break;
  58         case IPPROTO_TCP:
  59                 seq_printf(s, "sport=%hu dport=%hu ",
  60                            ntohs(tuple->src.u.tcp.port),
  61                            ntohs(tuple->dst.u.tcp.port));
  62                 break;
  63         case IPPROTO_UDPLITE:
  64         case IPPROTO_UDP:
  65                 seq_printf(s, "sport=%hu dport=%hu ",
  66                            ntohs(tuple->src.u.udp.port),
  67                            ntohs(tuple->dst.u.udp.port));
  68
  69                 break;
  70         case IPPROTO_DCCP:
  71                 seq_printf(s, "sport=%hu dport=%hu ",
  72                            ntohs(tuple->src.u.dccp.port),
  73                            ntohs(tuple->dst.u.dccp.port));
  74                 break;
  75         case IPPROTO_SCTP:
  76                 seq_printf(s, "sport=%hu dport=%hu ",
  77                            ntohs(tuple->src.u.sctp.port),
  78                            ntohs(tuple->dst.u.sctp.port));
  79                 break;
  80         case IPPROTO_ICMPV6:
  81                 seq_printf(s, "type=%u code=%u id=%u ",
  82                            tuple->dst.u.icmp.type,
  83                            tuple->dst.u.icmp.code,
  84                            ntohs(tuple->src.u.icmp.id));
  85                 break;
  86         case IPPROTO_GRE:
  87                 seq_printf(s, "srckey=0x%x dstkey=0x%x ",
  88                            ntohs(tuple->src.u.gre.key),
  89                            ntohs(tuple->dst.u.gre.key));
  90                 break;
  91         default:
  92                 break;
  93         }
  94 }
  95 EXPORT_SYMBOL_GPL(print_tuple);
  96
  97 struct ct_iter_state {
  98         struct seq_net_private p;
  99         struct hlist_nulls_head *hash;
 100         unsigned int htable_size;
 101         unsigned int bucket;
 102         u_int64_t time_now;
 103 };
 104
 105 static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
 106 {
 107         struct ct_iter_state *st = seq->private;
 108         struct hlist_nulls_node *n;
 109
 110         for (st->bucket = 0;
 111              st->bucket < st->htable_size;
 112              st->bucket++) {
 113                 n = rcu_dereference(
 114                         hlist_nulls_first_rcu(&st->hash[st->bucket]));
 115                 if (!is_a_nulls(n))
 116                         return n;
 117         }
 118         return NULL;
 119 }
 120
 121 static struct hlist_nulls_node *ct_get_next(struct seq_file *seq,
 122                                       struct hlist_nulls_node *head)
 123 {
 124         struct ct_iter_state *st = seq->private;
 125
 126         head = rcu_dereference(hlist_nulls_next_rcu(head));
 127         while (is_a_nulls(head)) {
 128                 if (likely(get_nulls_value(head) == st->bucket)) {
 129                         if (++st->bucket >= st->htable_size)
 130                                 return NULL;
 131                 }
 132                 head = rcu_dereference(
 133                         hlist_nulls_first_rcu(&st->hash[st->bucket]));
 134         }
 135         return head;
 136 }
 137
 138 static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos)
 139 {
 140         struct hlist_nulls_node *head = ct_get_first(seq);
 141
 142         if (head)
 143                 while (pos && (head = ct_get_next(seq, head)))
 144                         pos--;
 145         return pos ? NULL : head;
 146 }
 147
 148 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
 149         __acquires(RCU)
 150 {
 151         struct ct_iter_state *st = seq->private;
 152
 153         st->time_now = ktime_get_real_ns();
 154         rcu_read_lock();
 155
 156         nf_conntrack_get_ht(&st->hash, &st->htable_size);
 157         return ct_get_idx(seq, *pos);
 158 }
 159
 160 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
 161 {
 162         (*pos)++;
 163         return ct_get_next(s, v);
 164 }
 165
 166 static void ct_seq_stop(struct seq_file *s, void *v)
 167         __releases(RCU)
 168 {
 169         rcu_read_unlock();
 170 }
 171
 172 #ifdef CONFIG_NF_CONNTRACK_SECMARK
 173 static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
 174 {
 175         int ret;
 176         u32 len;
 177         char *secctx;
 178
 179         ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
 180         if (ret)
 181                 return;
 182
 183         seq_printf(s, "secctx=%s ", secctx);
 184
 185         security_release_secctx(secctx, len);
 186 }
 187 #else
 188 static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
 189 {
 190 }
 191 #endif
 192
 193 #ifdef CONFIG_NF_CONNTRACK_ZONES
 194 static void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
 195                          int dir)
 196 {
 197         const struct nf_conntrack_zone *zone = nf_ct_zone(ct);
 198
 199         if (zone->dir != dir)
 200                 return;
 201         switch (zone->dir) {
 202         case NF_CT_DEFAULT_ZONE_DIR:
 203                 seq_printf(s, "zone=%u ", zone->id);
 204                 break;
 205         case NF_CT_ZONE_DIR_ORIG:
 206                 seq_printf(s, "zone-orig=%u ", zone->id);
 207                 break;
 208         case NF_CT_ZONE_DIR_REPL:
 209                 seq_printf(s, "zone-reply=%u ", zone->id);
 210                 break;
 211         default:
 212                 break;
 213         }
 214 }
 215 #else
 216 static inline void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
 217                                 int dir)
 218 {
 219 }
 220 #endif
 221
 222 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 223 static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
 224 {
 225         struct ct_iter_state *st = s->private;
 226         struct nf_conn_tstamp *tstamp;
 227         s64 delta_time;
 228
 229         tstamp = nf_conn_tstamp_find(ct);
 230         if (tstamp) {
 231                 delta_time = st->time_now - tstamp->start;
 232                 if (delta_time > 0)
 233                         delta_time = div_s64(delta_time, NSEC_PER_SEC);
 234                 else
 235                         delta_time = 0;
 236
 237                 seq_printf(s, "delta-time=%llu ",
 238                            (unsigned long long)delta_time);
 239         }
 240         return;
 241 }
 242 #else
 243 static inline void
 244 ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
 245 {
 246 }
 247 #endif
 248
 249 static const char* l3proto_name(u16 proto)
 250 {
 251         switch (proto) {
 252         case AF_INET: return "ipv4";
 253         case AF_INET6: return "ipv6";
 254         }
 255
 256         return "unknown";
 257 }
 258
 259 static const char* l4proto_name(u16 proto)
 260 {
 261         switch (proto) {
 262         case IPPROTO_ICMP: return "icmp";
 263         case IPPROTO_TCP: return "tcp";
 264         case IPPROTO_UDP: return "udp";
 265         case IPPROTO_DCCP: return "dccp";
 266         case IPPROTO_GRE: return "gre";
 267         case IPPROTO_SCTP: return "sctp";
 268         case IPPROTO_UDPLITE: return "udplite";
 269         case IPPROTO_ICMPV6: return "icmpv6";
 270         }
 271
 272         return "unknown";
 273 }
 274
 275 static unsigned int
 276 seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
 277 {
 278         struct nf_conn_acct *acct;
 279         struct nf_conn_counter *counter;
 280
 281         acct = nf_conn_acct_find(ct);
 282         if (!acct)
 283                 return 0;
 284
 285         counter = acct->counter;
 286         seq_printf(s, "packets=%llu bytes=%llu ",
 287                    (unsigned long long)atomic64_read(&counter[dir].packets),
 288                    (unsigned long long)atomic64_read(&counter[dir].bytes));
 289
 290         return 0;
 291 }
 292
 293 /* return 0 on success, 1 in case of error */
 294 static int ct_seq_show(struct seq_file *s, void *v)
 295 {
 296         struct nf_conntrack_tuple_hash *hash = v;
 297         struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
 298         const struct nf_conntrack_l4proto *l4proto;
 299         struct net *net = seq_file_net(s);
 300         int ret = 0;
 301
 302         WARN_ON(!ct);
 303         if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
 304                 return 0;
 305
 306         if (nf_ct_should_gc(ct)) {
 307                 nf_ct_kill(ct);
 308                 goto release;
 309         }
 310
 311         /* we only want to print DIR_ORIGINAL */
 312         if (NF_CT_DIRECTION(hash))
 313                 goto release;
 314
 315         if (!net_eq(nf_ct_net(ct), net))
 316                 goto release;
 317
 318         l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
 319
 320         ret = -ENOSPC;
 321         seq_printf(s, "%-8s %u %-8s %u ",
 322                    l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct),
 323                    l4proto_name(l4proto->l4proto), nf_ct_protonum(ct));
 324
 325         if (!test_bit(IPS_OFFLOAD_BIT, &ct->status))
 326                 seq_printf(s, "%ld ", nf_ct_expires(ct)  / HZ);
 327
 328         if (l4proto->print_conntrack)
 329                 l4proto->print_conntrack(s, ct);
 330
 331         print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
 332                     l4proto);
 333
 334         ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG);
 335
 336         if (seq_has_overflowed(s))
 337                 goto release;
 338
 339         if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
 340                 goto release;
 341
 342         if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
 343                 seq_puts(s, "[UNREPLIED] ");
 344
 345         print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto);
 346
 347         ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL);
 348
 349         if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
 350                 goto release;
 351
 352         if (test_bit(IPS_HW_OFFLOAD_BIT, &ct->status))
 353                 seq_puts(s, "[HW_OFFLOAD] ");
 354         else if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
 355                 seq_puts(s, "[OFFLOAD] ");
 356         else if (test_bit(IPS_ASSURED_BIT, &ct->status))
 357                 seq_puts(s, "[ASSURED] ");
 358
 359         if (seq_has_overflowed(s))
 360                 goto release;
 361
 362 #if defined(CONFIG_NF_CONNTRACK_MARK)
 363         seq_printf(s, "mark=%u ", ct->mark);
 364 #endif
 365
 366         ct_show_secctx(s, ct);
 367         ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR);
 368         ct_show_delta_time(s, ct);
 369
 370         seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use));
 371
 372         if (seq_has_overflowed(s))
 373                 goto release;
 374
 375         ret = 0;
 376 release:
 377         nf_ct_put(ct);
 378         return ret;
 379 }
 380
 381 static const struct seq_operations ct_seq_ops = {
 382         .start = ct_seq_start,
 383         .next  = ct_seq_next,
 384         .stop  = ct_seq_stop,
 385         .show  = ct_seq_show
 386 };
 387
 388 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
 389 {
 390         struct net *net = seq_file_net(seq);
 391         int cpu;
 392
 393         if (*pos == 0)
 394                 return SEQ_START_TOKEN;
 395
 396         for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
 397                 if (!cpu_possible(cpu))
 398                         continue;
 399                 *pos = cpu + 1;
 400                 return per_cpu_ptr(net->ct.stat, cpu);
 401         }
 402
 403         return NULL;
 404 }
 405
 406 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 407 {
 408         struct net *net = seq_file_net(seq);
 409         int cpu;
 410
 411         for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
 412                 if (!cpu_possible(cpu))
 413                         continue;
 414                 *pos = cpu + 1;
 415                 return per_cpu_ptr(net->ct.stat, cpu);
 416         }
 417         (*pos)++;
 418         return NULL;
 419 }
 420
 421 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
 422 {
 423 }
 424
 425 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
 426 {
 427         struct net *net = seq_file_net(seq);
 428         unsigned int nr_conntracks = atomic_read(&net->ct.count);
 429         const struct ip_conntrack_stat *st = v;
 430
 431         if (v == SEQ_START_TOKEN) {
 432                 seq_puts(seq, "entries  clashres found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error  expect_new expect_create expect_delete search_restart\n");
 433                 return 0;
 434         }
 435
 436         seq_printf(seq, "%08x  %08x %08x %08x %08x %08x %08x %08x "
 437                         "%08x %08x %08x %08x %08x  %08x %08x %08x %08x\n",
 438                    nr_conntracks,
 439                    st->clash_resolve,
 440                    st->found,
 441                    0,
 442                    st->invalid,
 443                    0,
 444                    0,
 445                    0,
 446                    st->insert,
 447                    st->insert_failed,
 448                    st->drop,
 449                    st->early_drop,
 450                    st->error,
 451
 452                    st->expect_new,
 453                    st->expect_create,
 454                    st->expect_delete,
 455                    st->search_restart
 456                 );
 457         return 0;
 458 }
 459
 460 static const struct seq_operations ct_cpu_seq_ops = {
 461         .start  = ct_cpu_seq_start,
 462         .next   = ct_cpu_seq_next,
 463         .stop   = ct_cpu_seq_stop,
 464         .show   = ct_cpu_seq_show,
 465 };
 466
 467 static int nf_conntrack_standalone_init_proc(struct net *net)
 468 {
 469         struct proc_dir_entry *pde;
 470         kuid_t root_uid;
 471         kgid_t root_gid;
 472
 473         pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops,
 474                         sizeof(struct ct_iter_state));
 475         if (!pde)
 476                 goto out_nf_conntrack;
 477
 478         root_uid = make_kuid(net->user_ns, 0);
 479         root_gid = make_kgid(net->user_ns, 0);
 480         if (uid_valid(root_uid) && gid_valid(root_gid))
 481                 proc_set_user(pde, root_uid, root_gid);
 482
 483         pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat,
 484                         &ct_cpu_seq_ops, sizeof(struct seq_net_private));
 485         if (!pde)
 486                 goto out_stat_nf_conntrack;
 487         return 0;
 488
 489 out_stat_nf_conntrack:
 490         remove_proc_entry("nf_conntrack", net->proc_net);
 491 out_nf_conntrack:
 492         return -ENOMEM;
 493 }
 494
 495 static void nf_conntrack_standalone_fini_proc(struct net *net)
 496 {
 497         remove_proc_entry("nf_conntrack", net->proc_net_stat);
 498         remove_proc_entry("nf_conntrack", net->proc_net);
 499 }
 500 #else
 501 static int nf_conntrack_standalone_init_proc(struct net *net)
 502 {
 503         return 0;
 504 }
 505
 506 static void nf_conntrack_standalone_fini_proc(struct net *net)
 507 {
 508 }
 509 #endif /* CONFIG_NF_CONNTRACK_PROCFS */
 510
 511 /* Sysctl support */
 512
 513 #ifdef CONFIG_SYSCTL
 514 /* Log invalid packets of a given protocol */
 515 static int log_invalid_proto_min __read_mostly;
 516 static int log_invalid_proto_max __read_mostly = 255;
 517
 518 /* size the user *wants to set */
 519 static unsigned int nf_conntrack_htable_size_user __read_mostly;
 520
 521 static int
 522 nf_conntrack_hash_sysctl(struct ctl_table *table, int write,
 523                          void *buffer, size_t *lenp, loff_t *ppos)
 524 {
 525         int ret;
 526
 527         /* module_param hashsize could have changed value */
 528         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
 529
 530         ret = proc_dointvec(table, write, buffer, lenp, ppos);
 531         if (ret < 0 || !write)
 532                 return ret;
 533
 534         /* update ret, we might not be able to satisfy request */
 535         ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
 536
 537         /* update it to the actual value used by conntrack */
 538         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
 539         return ret;
 540 }
 541
 542 static struct ctl_table_header *nf_ct_netfilter_header;
 543
 544 enum nf_ct_sysctl_index {
 545         NF_SYSCTL_CT_MAX,
 546         NF_SYSCTL_CT_COUNT,
 547         NF_SYSCTL_CT_BUCKETS,
 548         NF_SYSCTL_CT_CHECKSUM,
 549         NF_SYSCTL_CT_LOG_INVALID,
 550         NF_SYSCTL_CT_EXPECT_MAX,
 551         NF_SYSCTL_CT_ACCT,
 552         NF_SYSCTL_CT_HELPER,
 553 #ifdef CONFIG_NF_CONNTRACK_EVENTS
 554         NF_SYSCTL_CT_EVENTS,
 555 #endif
 556 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 557         NF_SYSCTL_CT_TIMESTAMP,
 558 #endif
 559         NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
 560         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
 561         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
 562         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
 563         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
 564         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
 565         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
 566         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
 567         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
 568         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
 569         NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
 570         NF_SYSCTL_CT_PROTO_TCP_LOOSE,
 571         NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
 572         NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
 573         NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
 574         NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
 575         NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
 576         NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
 577 #ifdef CONFIG_NF_CT_PROTO_SCTP
 578         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
 579         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
 580         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
 581         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
 582         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
 583         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
 584         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
 585         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
 586         NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED,
 587 #endif
 588 #ifdef CONFIG_NF_CT_PROTO_DCCP
 589         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST,
 590         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND,
 591         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN,
 592         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN,
 593         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ,
 594         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING,
 595         NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT,
 596         NF_SYSCTL_CT_PROTO_DCCP_LOOSE,
 597 #endif
 598 #ifdef CONFIG_NF_CT_PROTO_GRE
 599         NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
 600         NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
 601 #endif
 602
 603         __NF_SYSCTL_CT_LAST_SYSCTL,
 604 };
 605
 606 #define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1)
 607
 608 static struct ctl_table nf_ct_sysctl_table[] = {
 609         [NF_SYSCTL_CT_MAX] = {
 610                 .procname       = "nf_conntrack_max",
 611                 .data           = &nf_conntrack_max,
 612                 .maxlen         = sizeof(int),
 613                 .mode           = 0644,
 614                 .proc_handler   = proc_dointvec,
 615         },
 616         [NF_SYSCTL_CT_COUNT] = {
 617                 .procname       = "nf_conntrack_count",
 618                 .data           = &init_net.ct.count,
 619                 .maxlen         = sizeof(int),
 620                 .mode           = 0444,
 621                 .proc_handler   = proc_dointvec,
 622         },
 623         [NF_SYSCTL_CT_BUCKETS] = {
 624                 .procname       = "nf_conntrack_buckets",
 625                 .data           = &nf_conntrack_htable_size_user,
 626                 .maxlen         = sizeof(unsigned int),
 627                 .mode           = 0644,
 628                 .proc_handler   = nf_conntrack_hash_sysctl,
 629         },
 630         [NF_SYSCTL_CT_CHECKSUM] = {
 631                 .procname       = "nf_conntrack_checksum",
 632                 .data           = &init_net.ct.sysctl_checksum,
 633                 .maxlen         = sizeof(int),
 634                 .mode           = 0644,
 635                 .proc_handler   = proc_dointvec_minmax,
 636                 .extra1         = SYSCTL_ZERO,
 637                 .extra2         = SYSCTL_ONE,
 638         },
 639         [NF_SYSCTL_CT_LOG_INVALID] = {
 640                 .procname       = "nf_conntrack_log_invalid",
 641                 .data           = &init_net.ct.sysctl_log_invalid,
 642                 .maxlen         = sizeof(unsigned int),
 643                 .mode           = 0644,
 644                 .proc_handler   = proc_dointvec_minmax,
 645                 .extra1         = &log_invalid_proto_min,
 646                 .extra2         = &log_invalid_proto_max,
 647         },
 648         [NF_SYSCTL_CT_EXPECT_MAX] = {
 649                 .procname       = "nf_conntrack_expect_max",
 650                 .data           = &nf_ct_expect_max,
 651                 .maxlen         = sizeof(int),
 652                 .mode           = 0644,
 653                 .proc_handler   = proc_dointvec,
 654         },
 655         [NF_SYSCTL_CT_ACCT] = {
 656                 .procname       = "nf_conntrack_acct",
 657                 .data           = &init_net.ct.sysctl_acct,
 658                 .maxlen         = sizeof(int),
 659                 .mode           = 0644,
 660                 .proc_handler   = proc_dointvec_minmax,
 661                 .extra1         = SYSCTL_ZERO,
 662                 .extra2         = SYSCTL_ONE,
 663         },
 664         [NF_SYSCTL_CT_HELPER] = {
 665                 .procname       = "nf_conntrack_helper",
 666                 .data           = &init_net.ct.sysctl_auto_assign_helper,
 667                 .maxlen         = sizeof(int),
 668                 .mode           = 0644,
 669                 .proc_handler   = proc_dointvec_minmax,
 670                 .extra1         = SYSCTL_ZERO,
 671                 .extra2         = SYSCTL_ONE,
 672         },
 673 #ifdef CONFIG_NF_CONNTRACK_EVENTS
 674         [NF_SYSCTL_CT_EVENTS] = {
 675                 .procname       = "nf_conntrack_events",
 676                 .data           = &init_net.ct.sysctl_events,
 677                 .maxlen         = sizeof(int),
 678                 .mode           = 0644,
 679                 .proc_handler   = proc_dointvec_minmax,
 680                 .extra1         = SYSCTL_ZERO,
 681                 .extra2         = SYSCTL_ONE,
 682         },
 683 #endif
 684 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 685         [NF_SYSCTL_CT_TIMESTAMP] = {
 686                 .procname       = "nf_conntrack_timestamp",
 687                 .data           = &init_net.ct.sysctl_tstamp,
 688                 .maxlen         = sizeof(int),
 689                 .mode           = 0644,
 690                 .proc_handler   = proc_dointvec_minmax,
 691                 .extra1         = SYSCTL_ZERO,
 692                 .extra2         = SYSCTL_ONE,
 693         },
 694 #endif
 695         [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
 696                 .procname       = "nf_conntrack_generic_timeout",
 697                 .maxlen         = sizeof(unsigned int),
 698                 .mode           = 0644,
 699                 .proc_handler   = proc_dointvec_jiffies,
 700         },
 701         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
 702                 .procname       = "nf_conntrack_tcp_timeout_syn_sent",
 703                 .maxlen         = sizeof(unsigned int),
 704                 .mode           = 0644,
 705                 .proc_handler   = proc_dointvec_jiffies,
 706         },
 707         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
 708                 .procname       = "nf_conntrack_tcp_timeout_syn_recv",
 709                 .maxlen         = sizeof(unsigned int),
 710                 .mode           = 0644,
 711                 .proc_handler   = proc_dointvec_jiffies,
 712         },
 713         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
 714                 .procname       = "nf_conntrack_tcp_timeout_established",
 715                 .maxlen         = sizeof(unsigned int),
 716                 .mode           = 0644,
 717                 .proc_handler   = proc_dointvec_jiffies,
 718         },
 719         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
 720                 .procname       = "nf_conntrack_tcp_timeout_fin_wait",
 721                 .maxlen         = sizeof(unsigned int),
 722                 .mode           = 0644,
 723                 .proc_handler   = proc_dointvec_jiffies,
 724         },
 725         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
 726                 .procname       = "nf_conntrack_tcp_timeout_close_wait",
 727                 .maxlen         = sizeof(unsigned int),
 728                 .mode           = 0644,
 729                 .proc_handler   = proc_dointvec_jiffies,
 730         },
 731         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
 732                 .procname       = "nf_conntrack_tcp_timeout_last_ack",
 733                 .maxlen         = sizeof(unsigned int),
 734                 .mode           = 0644,
 735                 .proc_handler   = proc_dointvec_jiffies,
 736         },
 737         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
 738                 .procname       = "nf_conntrack_tcp_timeout_time_wait",
 739                 .maxlen         = sizeof(unsigned int),
 740                 .mode           = 0644,
 741                 .proc_handler   = proc_dointvec_jiffies,
 742         },
 743         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
 744                 .procname       = "nf_conntrack_tcp_timeout_close",
 745                 .maxlen         = sizeof(unsigned int),
 746                 .mode           = 0644,
 747                 .proc_handler   = proc_dointvec_jiffies,
 748         },
 749         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
 750                 .procname       = "nf_conntrack_tcp_timeout_max_retrans",
 751                 .maxlen         = sizeof(unsigned int),
 752                 .mode           = 0644,
 753                 .proc_handler   = proc_dointvec_jiffies,
 754         },
 755         [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
 756                 .procname       = "nf_conntrack_tcp_timeout_unacknowledged",
 757                 .maxlen         = sizeof(unsigned int),
 758                 .mode           = 0644,
 759                 .proc_handler   = proc_dointvec_jiffies,
 760         },
 761         [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
 762                 .procname       = "nf_conntrack_tcp_loose",
 763                 .maxlen         = sizeof(int),
 764                 .mode           = 0644,
 765                 .proc_handler   = proc_dointvec_minmax,
 766                 .extra1         = SYSCTL_ZERO,
 767                 .extra2         = SYSCTL_ONE,
 768         },
 769         [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
 770                 .procname       = "nf_conntrack_tcp_be_liberal",
 771                 .maxlen         = sizeof(int),
 772                 .mode           = 0644,
 773                 .proc_handler   = proc_dointvec_minmax,
 774                 .extra1         = SYSCTL_ZERO,
 775                 .extra2         = SYSCTL_ONE,
 776         },
 777         [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
 778                 .procname       = "nf_conntrack_tcp_max_retrans",
 779                 .maxlen         = sizeof(unsigned int),
 780                 .mode           = 0644,
 781                 .proc_handler   = proc_dointvec,
 782         },
 783         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
 784                 .procname       = "nf_conntrack_udp_timeout",
 785                 .maxlen         = sizeof(unsigned int),
 786                 .mode           = 0644,
 787                 .proc_handler   = proc_dointvec_jiffies,
 788         },
 789         [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
 790                 .procname       = "nf_conntrack_udp_timeout_stream",
 791                 .maxlen         = sizeof(unsigned int),
 792                 .mode           = 0644,
 793                 .proc_handler   = proc_dointvec_jiffies,
 794         },
 795         [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
 796                 .procname       = "nf_conntrack_icmp_timeout",
 797                 .maxlen         = sizeof(unsigned int),
 798                 .mode           = 0644,
 799                 .proc_handler   = proc_dointvec_jiffies,
 800         },
 801         [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
 802                 .procname       = "nf_conntrack_icmpv6_timeout",
 803                 .maxlen         = sizeof(unsigned int),
 804                 .mode           = 0644,
 805                 .proc_handler   = proc_dointvec_jiffies,
 806         },
 807 #ifdef CONFIG_NF_CT_PROTO_SCTP
 808         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
 809                 .procname       = "nf_conntrack_sctp_timeout_closed",
 810                 .maxlen         = sizeof(unsigned int),
 811                 .mode           = 0644,
 812                 .proc_handler   = proc_dointvec_jiffies,
 813         },
 814         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
 815                 .procname       = "nf_conntrack_sctp_timeout_cookie_wait",
 816                 .maxlen         = sizeof(unsigned int),
 817                 .mode           = 0644,
 818                 .proc_handler   = proc_dointvec_jiffies,
 819         },
 820         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
 821                 .procname       = "nf_conntrack_sctp_timeout_cookie_echoed",
 822                 .maxlen         = sizeof(unsigned int),
 823                 .mode           = 0644,
 824                 .proc_handler   = proc_dointvec_jiffies,
 825         },
 826         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
 827                 .procname       = "nf_conntrack_sctp_timeout_established",
 828                 .maxlen         = sizeof(unsigned int),
 829                 .mode           = 0644,
 830                 .proc_handler   = proc_dointvec_jiffies,
 831         },
 832         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
 833                 .procname       = "nf_conntrack_sctp_timeout_shutdown_sent",
 834                 .maxlen         = sizeof(unsigned int),
 835                 .mode           = 0644,
 836                 .proc_handler   = proc_dointvec_jiffies,
 837         },
 838         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
 839                 .procname       = "nf_conntrack_sctp_timeout_shutdown_recd",
 840                 .maxlen         = sizeof(unsigned int),
 841                 .mode           = 0644,
 842                 .proc_handler   = proc_dointvec_jiffies,
 843         },
 844         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
 845                 .procname       = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
 846                 .maxlen         = sizeof(unsigned int),
 847                 .mode           = 0644,
 848                 .proc_handler   = proc_dointvec_jiffies,
 849         },
 850         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
 851                 .procname       = "nf_conntrack_sctp_timeout_heartbeat_sent",
 852                 .maxlen         = sizeof(unsigned int),
 853                 .mode           = 0644,
 854                 .proc_handler   = proc_dointvec_jiffies,
 855         },
 856         [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED] = {
 857                 .procname       = "nf_conntrack_sctp_timeout_heartbeat_acked",
 858                 .maxlen         = sizeof(unsigned int),
 859                 .mode           = 0644,
 860                 .proc_handler   = proc_dointvec_jiffies,
 861         },
 862 #endif
 863 #ifdef CONFIG_NF_CT_PROTO_DCCP
 864         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
 865                 .procname       = "nf_conntrack_dccp_timeout_request",
 866                 .maxlen         = sizeof(unsigned int),
 867                 .mode           = 0644,
 868                 .proc_handler   = proc_dointvec_jiffies,
 869         },
 870         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
 871                 .procname       = "nf_conntrack_dccp_timeout_respond",
 872                 .maxlen         = sizeof(unsigned int),
 873                 .mode           = 0644,
 874                 .proc_handler   = proc_dointvec_jiffies,
 875         },
 876         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
 877                 .procname       = "nf_conntrack_dccp_timeout_partopen",
 878                 .maxlen         = sizeof(unsigned int),
 879                 .mode           = 0644,
 880                 .proc_handler   = proc_dointvec_jiffies,
 881         },
 882         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
 883                 .procname       = "nf_conntrack_dccp_timeout_open",
 884                 .maxlen         = sizeof(unsigned int),
 885                 .mode           = 0644,
 886                 .proc_handler   = proc_dointvec_jiffies,
 887         },
 888         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
 889                 .procname       = "nf_conntrack_dccp_timeout_closereq",
 890                 .maxlen         = sizeof(unsigned int),
 891                 .mode           = 0644,
 892                 .proc_handler   = proc_dointvec_jiffies,
 893         },
 894         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
 895                 .procname       = "nf_conntrack_dccp_timeout_closing",
 896                 .maxlen         = sizeof(unsigned int),
 897                 .mode           = 0644,
 898                 .proc_handler   = proc_dointvec_jiffies,
 899         },
 900         [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
 901                 .procname       = "nf_conntrack_dccp_timeout_timewait",
 902                 .maxlen         = sizeof(unsigned int),
 903                 .mode           = 0644,
 904                 .proc_handler   = proc_dointvec_jiffies,
 905         },
 906         [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
 907                 .procname       = "nf_conntrack_dccp_loose",
 908                 .maxlen         = sizeof(int),
 909                 .mode           = 0644,
 910                 .proc_handler   = proc_dointvec_minmax,
 911                 .extra1         = SYSCTL_ZERO,
 912                 .extra2         = SYSCTL_ONE,
 913         },
 914 #endif
 915 #ifdef CONFIG_NF_CT_PROTO_GRE
 916         [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
 917                 .procname       = "nf_conntrack_gre_timeout",
 918                 .maxlen         = sizeof(unsigned int),
 919                 .mode           = 0644,
 920                 .proc_handler   = proc_dointvec_jiffies,
 921         },
 922         [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
 923                 .procname       = "nf_conntrack_gre_timeout_stream",
 924                 .maxlen         = sizeof(unsigned int),
 925                 .mode           = 0644,
 926                 .proc_handler   = proc_dointvec_jiffies,
 927         },
 928 #endif
 929         {}
 930 };
 931
 932 static struct ctl_table nf_ct_netfilter_table[] = {
 933         {
 934                 .procname       = "nf_conntrack_max",
 935                 .data           = &nf_conntrack_max,
 936                 .maxlen         = sizeof(int),
 937                 .mode           = 0644,
 938                 .proc_handler   = proc_dointvec,
 939         },
 940         { }
 941 };
 942
 943 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
 944                                                     struct ctl_table *table)
 945 {
 946         struct nf_tcp_net *tn = nf_tcp_pernet(net);
 947
 948 #define XASSIGN(XNAME, tn) \
 949         table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
 950                         &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
 951
 952         XASSIGN(SYN_SENT, tn);
 953         XASSIGN(SYN_RECV, tn);
 954         XASSIGN(ESTABLISHED, tn);
 955         XASSIGN(FIN_WAIT, tn);
 956         XASSIGN(CLOSE_WAIT, tn);
 957         XASSIGN(LAST_ACK, tn);
 958         XASSIGN(TIME_WAIT, tn);
 959         XASSIGN(CLOSE, tn);
 960         XASSIGN(RETRANS, tn);
 961         XASSIGN(UNACK, tn);
 962 #undef XASSIGN
 963 #define XASSIGN(XNAME, rval) \
 964         table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
 965
 966         XASSIGN(LOOSE, &tn->tcp_loose);
 967         XASSIGN(LIBERAL, &tn->tcp_be_liberal);
 968         XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
 969 #undef XASSIGN
 970 }
 971
 972 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
 973                                                      struct ctl_table *table)
 974 {
 975 #ifdef CONFIG_NF_CT_PROTO_SCTP
 976         struct nf_sctp_net *sn = nf_sctp_pernet(net);
 977
 978 #define XASSIGN(XNAME, sn) \
 979         table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
 980                         &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
 981
 982         XASSIGN(CLOSED, sn);
 983         XASSIGN(COOKIE_WAIT, sn);
 984         XASSIGN(COOKIE_ECHOED, sn);
 985         XASSIGN(ESTABLISHED, sn);
 986         XASSIGN(SHUTDOWN_SENT, sn);
 987         XASSIGN(SHUTDOWN_RECD, sn);
 988         XASSIGN(SHUTDOWN_ACK_SENT, sn);
 989         XASSIGN(HEARTBEAT_SENT, sn);
 990         XASSIGN(HEARTBEAT_ACKED, sn);
 991 #undef XASSIGN
 992 #endif
 993 }
 994
 995 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
 996                                                      struct ctl_table *table)
 997 {
 998 #ifdef CONFIG_NF_CT_PROTO_DCCP
 999         struct nf_dccp_net *dn = nf_dccp_pernet(net);
1000
1001 #define XASSIGN(XNAME, dn) \
1002         table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
1003                         &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1004
1005         XASSIGN(REQUEST, dn);
1006         XASSIGN(RESPOND, dn);
1007         XASSIGN(PARTOPEN, dn);
1008         XASSIGN(OPEN, dn);
1009         XASSIGN(CLOSEREQ, dn);
1010         XASSIGN(CLOSING, dn);
1011         XASSIGN(TIMEWAIT, dn);
1012 #undef XASSIGN
1013
1014         table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1015 #endif
1016 }
1017
1018 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1019                                                     struct ctl_table *table)
1020 {
1021 #ifdef CONFIG_NF_CT_PROTO_GRE
1022         struct nf_gre_net *gn = nf_gre_pernet(net);
1023
1024         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1025         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1026 #endif
1027 }
1028
1029 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1030 {
1031         struct nf_udp_net *un = nf_udp_pernet(net);
1032         struct ctl_table *table;
1033
1034         BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1035
1036         table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1037                         GFP_KERNEL);
1038         if (!table)
1039                 return -ENOMEM;
1040
1041         table[NF_SYSCTL_CT_COUNT].data = &net->ct.count;
1042         table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1043         table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1044         table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1045         table[NF_SYSCTL_CT_HELPER].data = &net->ct.sysctl_auto_assign_helper;
1046 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1047         table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1048 #endif
1049 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1050         table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1051 #endif
1052         table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1053         table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1054         table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1055         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1056         table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1057
1058         nf_conntrack_standalone_init_tcp_sysctl(net, table);
1059         nf_conntrack_standalone_init_sctp_sysctl(net, table);
1060         nf_conntrack_standalone_init_dccp_sysctl(net, table);
1061         nf_conntrack_standalone_init_gre_sysctl(net, table);
1062
1063         /* Don't allow unprivileged users to alter certain sysctls */
1064         if (net->user_ns != &init_user_ns) {
1065                 table[NF_SYSCTL_CT_MAX].mode = 0444;
1066                 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1067                 table[NF_SYSCTL_CT_HELPER].mode = 0444;
1068 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1069                 table[NF_SYSCTL_CT_EVENTS].mode = 0444;
1070 #endif
1071                 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1072         } else if (!net_eq(&init_net, net)) {
1073                 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1074         }
1075
1076         net->ct.sysctl_header = register_net_sysctl(net, "net/netfilter", table);
1077         if (!net->ct.sysctl_header)
1078                 goto out_unregister_netfilter;
1079
1080         return 0;
1081
1082 out_unregister_netfilter:
1083         kfree(table);
1084         return -ENOMEM;
1085 }
1086
1087 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1088 {
1089         struct ctl_table *table;
1090
1091         table = net->ct.sysctl_header->ctl_table_arg;
1092         unregister_net_sysctl_table(net->ct.sysctl_header);
1093         kfree(table);
1094 }
1095 #else
1096 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1097 {
1098         return 0;
1099 }
1100
1101 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1102 {
1103 }
1104 #endif /* CONFIG_SYSCTL */
1105
1106 static void nf_conntrack_fini_net(struct net *net)
1107 {
1108         if (enable_hooks)
1109                 nf_ct_netns_put(net, NFPROTO_INET);
1110
1111         nf_conntrack_standalone_fini_proc(net);
1112         nf_conntrack_standalone_fini_sysctl(net);
1113 }
1114
1115 static int nf_conntrack_pernet_init(struct net *net)
1116 {
1117         int ret;
1118
1119         net->ct.sysctl_checksum = 1;
1120
1121         ret = nf_conntrack_standalone_init_sysctl(net);
1122         if (ret < 0)
1123                 return ret;
1124
1125         ret = nf_conntrack_standalone_init_proc(net);
1126         if (ret < 0)
1127                 goto out_proc;
1128
1129         ret = nf_conntrack_init_net(net);
1130         if (ret < 0)
1131                 goto out_init_net;
1132
1133         if (enable_hooks) {
1134                 ret = nf_ct_netns_get(net, NFPROTO_INET);
1135                 if (ret < 0)
1136                         goto out_hooks;
1137         }
1138
1139         return 0;
1140
1141 out_hooks:
1142         nf_conntrack_cleanup_net(net);
1143 out_init_net:
1144         nf_conntrack_standalone_fini_proc(net);
1145 out_proc:
1146         nf_conntrack_standalone_fini_sysctl(net);
1147         return ret;
1148 }
1149
1150 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1151 {
1152         struct net *net;
1153
1154         list_for_each_entry(net, net_exit_list, exit_list)
1155                 nf_conntrack_fini_net(net);
1156
1157         nf_conntrack_cleanup_net_list(net_exit_list);
1158 }
1159
1160 static struct pernet_operations nf_conntrack_net_ops = {
1161         .init           = nf_conntrack_pernet_init,
1162         .exit_batch     = nf_conntrack_pernet_exit,
1163         .id             = &nf_conntrack_net_id,
1164         .size = sizeof(struct nf_conntrack_net),
1165 };
1166
1167 static int __init nf_conntrack_standalone_init(void)
1168 {
1169         int ret = nf_conntrack_init_start();
1170         if (ret < 0)
1171                 goto out_start;
1172
1173         BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1174
1175 #ifdef CONFIG_SYSCTL
1176         nf_ct_netfilter_header =
1177                 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1178         if (!nf_ct_netfilter_header) {
1179                 pr_err("nf_conntrack: can't register to sysctl.\n");
1180                 ret = -ENOMEM;
1181                 goto out_sysctl;
1182         }
1183
1184         nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1185 #endif
1186
1187         ret = register_pernet_subsys(&nf_conntrack_net_ops);
1188         if (ret < 0)
1189                 goto out_pernet;
1190
1191         nf_conntrack_init_end();
1192         return 0;
1193
1194 out_pernet:
1195 #ifdef CONFIG_SYSCTL
1196         unregister_net_sysctl_table(nf_ct_netfilter_header);
1197 out_sysctl:
1198 #endif
1199         nf_conntrack_cleanup_end();
1200 out_start:
1201         return ret;
1202 }
1203
1204 static void __exit nf_conntrack_standalone_fini(void)
1205 {
1206         nf_conntrack_cleanup_start();
1207         unregister_pernet_subsys(&nf_conntrack_net_ops);
1208 #ifdef CONFIG_SYSCTL
1209         unregister_net_sysctl_table(nf_ct_netfilter_header);
1210 #endif
1211         nf_conntrack_cleanup_end();
1212 }
1213
1214 module_init(nf_conntrack_standalone_init);
1215 module_exit(nf_conntrack_standalone_fini);